August 21 in Groton, through the years

Typical high: 23.3°. Hottest: 26.1° (2005). Coldest night: 14.5° (2000).

YEARHIGHLOWRAIN
2025 20.2° 16.7° 3.7 mm
2024 21.1° 15.1° 0 mm
2023 25° 21.1° 0.1 mm
2022 23.7° 21° 0 mm
2021 25.4° 22.1° 0 mm
2020 24.1° 20.5° 0 mm
2019 24.7° 21.5° 1.7 mm
2018 22.3° 18.9° 0 mm
2017 24.2° 20° 0 mm
2016 23.8° 21.9° 1.3 mm
2015 25.4° 22.4° 0.5 mm
2014 21.5° 17.6° 0 mm
2013 24.9° 19.6° 0 mm
2012 24.1° 21° 0 mm
2011 24.4° 21.6° 1 mm
2010 22.7° 19.5° 0.6 mm
2009 25.9° 23.1° 0 mm
2008 21.8° 17° 0 mm
2007 18.2° 14.8° 5.5 mm
2006 24° 20.3° 0 mm
2005 26.1° 22.7° 7.3 mm
2004 23.7° 18.9° 14.1 mm
2003 25.8° 22.7° 0 mm
2002 24.5° 20.2° 0 mm
2001 24.4° 21.9° 1.2 mm
2000 21.6° 14.5° 0 mm
1999 18.3° 16.9° 11.9 mm
1998 23° 20° 0 mm
1997 21.4° 18° 63.7 mm
1996 23° 20.1° 0.1 mm
Source: ERA5 reanalysis (Copernicus C3S)

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